CVE-2025-25291

CRITICAL
2025-03-12 [email protected]
9.3
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Analysis Generated
Mar 28, 2026 - 18:31 vuln.today
Patch Released
Mar 28, 2026 - 18:31 nvd
Patch available
PoC Detected
Nov 03, 2025 - 20:17 vuln.today
Public exploit code
CVE Published
Mar 12, 2025 - 21:15 nvd
CRITICAL 9.3

Tags

Jwt Attack Authentication Bypass Omniauth Saml Ruby Saml Storagegrid

Description

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vulnerability was found in ruby-saml prior to versions 1.12.4 and 1.18.0 due to a parser differential. ReXML and Nokogiri parse XML differently; the parsers can generate entirely different document structures from the same XML input. That allows an attacker to be able to execute a Signature Wrapping attack. This issue may lead to authentication bypass. Versions 1.12.4 and 1.18.0 fix the issue.

Analysis

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 13.8%.

Technical Context

This vulnerability is classified under CWE-347. ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vulnerability was found in ruby-saml prior to versions 1.12.4 and 1.18.0 due to a parser differential. ReXML and Nokogiri parse XML differently; the parsers can generate entirely different document structures from the same XML input. That allows an attacker to be able to execute a Signature Wrapping attack. This issue may lead to authentication bypass. Versions 1.12.4 and 1.18.0 fix the issue. Affected products include: Omniauth Omniauth Saml, Onelogin Ruby-Saml, Netapp Storagegrid.

Affected Products

Omniauth Omniauth Saml, Onelogin Ruby-Saml, Netapp Storagegrid.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Priority Score

80
Low Medium High Critical
KEV: 0
EPSS: +13.8
CVSS: +46
POC: +20

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CVE-2025-25291 vulnerability details – vuln.today
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